﻿/*
   Copyright 2013 Dmitry Bratus

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

using System.Collections.Generic;
using Flower.Services.Data;
using Flower.Workflow;

namespace Flower.Client
{
    internal class SetPermissionBuilder : ISetPermissionBuilder
    {
        private readonly List<AccessControlEntry> _acl = new List<AccessControlEntry>();

        public ICollection<AccessControlEntry> Acl { get { return _acl; } } 

        private void Grant(string role, Permission permission)
        {
            foreach (AccessControlEntry entry in _acl)
            {
                if (entry.Role == role)
                {
                    entry.Permission |= permission;
                    return;
                }
            }

            _acl.Add(new AccessControlEntry { Role = role, Permission = permission });
        }

        public ISetPermissionBuilder AllowGetTo(string role)
        {
            Grant(role, Permission.Read);
            return this;
        }

        public ISetPermissionBuilder AllowPutTo(string role)
        {
            Grant(role, Permission.CreateChildren);
            return this;
        }
    }
}
